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Wyszukujesz frazę "Ahmad, Akhtar" wg kryterium: Autor

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Are the urban poor satisfied with health care services for child delivery? Evidence from an Urban Primary Health Care (UPHC) Project in Bangladesh
    Autorzy:
    Rahman, Mizanur
    Mizan, Sharmin
    Safii, Razitasham
    Ahmad, Akhtar
    Powiązania:
    https://bibliotekanauki.pl/articles/552095.pdf
    Data publikacji:
    2018
    Wydawca:
    Stowarzyszenie Przyjaciół Medycyny Rodzinnej i Lekarzy Rodzinnych
    Tematy:
    patient satisfaction
    Primary Health Care
    Delivery of Health Care
    Bangladesh.
    Źródło:
    Family Medicine & Primary Care Review; 2018, 2; 159-166
    1734-3402
    Pojawia się w:
    Family Medicine & Primary Care Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Uncertainty analysis of operational conditions in selective artificial ground freezing applications
    Autorzy:
    Zueter, Ahmad
    Akhtar, Saad
    Sasmito, Agus
    Powiązania:
    https://bibliotekanauki.pl/articles/2201410.pdf
    Data publikacji:
    2022
    Wydawca:
    Główny Instytut Górnictwa
    Tematy:
    selective artificial ground freezing
    Monte Carlo
    pipes eccentricity
    uncertainty analysis
    reduced-order modelling
    selektywne sztuczne zamarzanie gruntu
    analiza niepewności
    modelowanie zredukowanego rzędu
    Opis:
    Artificial ground freezing (AGF) systems are susceptible to uncertain parameters highly affecting their performance. Particularly, selective artificial ground freezing (S-AGF) systems involve several uncertain operational conditions. In this study, uncertainty analysis is conducted to investigate four operational parameters: 1) coolant inlet temperature, 2) coolant flow rate, 3) pipes emissivity, and 4) pipes eccentricity. A reduced-order model developed and validated in our previous work for field-scale applications is exploited to simulate a total of 5,000 cases. The uncertain operational parameters are set according to Monte Carlo analysis based on field observations of a field-scale freeze-pipe in the mining industry extending to 460 m below the ground surface. The results indicate that the freezing time can range between 270 and 350 days with an average of 310 days, whereas the cooling load per one freeze-pipe ranges from 90 to 160 MWh, with an average of 129 MWh. Furthermore, it is observed that the freezing time and energy consumed are mostly dominated by the coolant inlet temperature, while energy dissipated in the passive zone (where ground freezing is not needed) is mostly affected by pipes emissivity. Overall, the conclusions of this study provide useful estimations for engineers and practitioners in the AGF industry.
    Źródło:
    Journal of Sustainable Mining; 2022, 21, 3; 169--179
    2300-1364
    2300-3960
    Pojawia się w:
    Journal of Sustainable Mining
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phenolic, carotenoid, ascorbic acid contents and their antioxidant activities in bell pepper
    Autorzy:
    Akhtar, M.
    Ahmad, A.
    Masud, T.
    Wattoo, F.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/12661132.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    plant cultivation
    sweet pepper
    chemical composition
    phenolic acid
    carotenoid content
    ascorbic acid content
    antioxidant activity
    Opis:
    Essential nutritional components are quantified in the study in addition to major antioxidants, carotenoids, phenols and flavonoids. Their antioxidant activities were also analyzed using DPPH, ABTS and hydrogen peroxide radical scavenging activities and by determining their iron reducing power. Results indicated that the highest quantity of nutritional and antioxidant components was obtained in red variety (4.63 mg/g ascorbic acid, 10.32 mg/g total carotenoid content, 61.50 mg/g total flavonoid content, 310.27 mg/g total phenolic content) followed by orange, yellow and green varieties. Similar trend was observed while analyzing their antioxidant activities by different methods. In studying correlation between components and antioxidant activity, a strong correlation was obtained for ABTS radical scavenging activity with total phenolic content (R2 = 0.722) and total carotenoid contents (R2 = 0.709), while moderate correlation was observed for ABTS radical scavenging activity with total flavonoid contents (R2 = 0.517) and ascorbic acid (R2 = 0.673).
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 1; 13-21
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Noise Monitoring, Mapping, and Modelling Studies – A Review
    Autorzy:
    Alam, Pervez
    Ahmad, Kafeel
    Afsar, Shakil S.
    Akhtar, Nasim
    Powiązania:
    https://bibliotekanauki.pl/articles/125244.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    noise mapping
    noise monitoring
    noise modelling
    CoRTN
    FHWA
    Opis:
    This paper reviews the literature on noise monitoring, noise mapping and noise modeling studies carried out in different countries by many researchers. The article reveals the current status of the noise-related studies and noise mapping studies. It was discovered that 90% of the noise monitoring studies were focused on the traffic noise, while the remaining 10% focused on the residential, commercial and industrial areas. Sometimes, there may be a necessity to analyze the sound pressure levels all over the place, or around a particular piece of land and machinery of industry. Researchers have used the noise monitoring data for the development of 2D and 3D noise maps which gives a clear picture of the noise level around the source of noise in X, Y, and Z direction. For taking a decision regarding the noise level for any development project, predicting the noise level is always necessary. The traffic noise models are generally used for the purpose of prediction. Early models are based on constant vehicle speed, later some models predicted the noise level for interrupting the traffic flow. For instance, the Stop and Go model can be used for the prediction of the noise level in an interrupted flow. Four such models were reviewed and compared in this article.
    Źródło:
    Journal of Ecological Engineering; 2020, 21, 4; 82-93
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seismic evaluation of deficient reinforced concrete weak beam-column joint frames
    Autorzy:
    Rizwan, Muhammad
    Ahmad, Naveed
    Khan, Akhtar Naeem
    Fahad, Muhammad
    Powiązania:
    https://bibliotekanauki.pl/articles/1849753.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    rama żelbetowa
    moment wyjątkowy
    rama odporna
    współczynnik modyfikacji odpowiedzi
    połączenie belka-słup
    odpowiedź sejsmiczna
    reinforced concrete
    frame structure
    special moment
    resisting frame
    response modification factor
    beam-column joint
    seismic response
    Opis:
    The use of old building design codes and improper execution of recent seismic design practices have caused large amount of substandard and vulnerable reinforced concrete RC building stock majority of which are built with weak beam-column joint connections defect (i.e. joint panel having no transverse reinforcement and built in low strength concrete). In order to understand the seismic response and damage behaviour of recent special moment resisting frame SMRF structures with the defect of weak beam-column joints, shake table tests have been performed on two 1:3 reduced scaled, two story RC frame models. The representative reference code design and weak beam-column joint frame models were subjected to uni-directional dynamic excitations of increasing intensities using the natural record of 1994 Northridge Earthquake. The input scaled excitations were applied from 5% to 130% of the maximum input peak ground acceleration record, to deformed the test models from elastic to inelastic stage and then to fully plastic incipient collapse stage. The weak beam-column frame experienced column flexure cracking, longitudinal bar-slip in beam members and observed with cover concrete spalling and severe damageability of the joint panels upon subjected to multiple dynamic excitations. The deficient frame was only able to resist 40% of the maximum acceleration input as compared to the code design frame which was able to resist about 130%. The seismic performance of considered RC frames was evaluated in terms of seismic response parameters (seismic response modification, overstrength and displacement ductility factors), for critical comparison.
    Źródło:
    Archives of Civil Engineering; 2020, 66, 4; 429-451
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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